import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'
import store from "../store"


// 把这段代码直接粘贴到router/index.js中的Vue.use(VueRouter)之前
const originalPush = VueRouter.prototype.push;
VueRouter.prototype.push = function(location) {
    return originalPush.call(this, location).catch(err => {})
};


Vue.use(VueRouter)

const routes = [{
        path: "/",
        redirect: "/home"
    },
    {
        path: '/home',
        name: 'Home',
        component: Home,
        children: [{
            path: "/home/searchpopup",
            component: () =>
                import ( /* webpackChunkName: "searchpopup" */ '../views/SearchPopup.vue')
        }],
        meta: {
            // 解决tabbar的小bug
            tabbarActiveNum: 0,
            // 是否展示tabbar
            isShowTabbar: true
        }
    },
    {
        path: '/topic',
        component: () =>
            import ( /* webpackChunkName: "topic" */ '../views/Topic.vue'),
        meta: {
            tabbarActiveNum: 1,
            isShowTabbar: true
        }
    },
    {
        path: '/category',
        component: () =>
            import ( /* webpackChunkName: "category" */ '../views/Category.vue'),
        meta: {
            tabbarActiveNum: 2,
            isShowTabbar: true
        }
    },
    {
        path: '/cart',
        component: () =>
            import ( /* webpackChunkName: "cart" */ '../views/Cart.vue'),
        meta: {
            tabbarActiveNum: 3,
            isShowTabbar: true
        }
    },
    {
        path: '/user',
        component: () =>
            import ( /* webpackChunkName: "user" */ '../views/User.vue'),
        meta: {
            tabbarActiveNum: 4,
            isShowTabbar: true
        }
    },
    {
        path: '/productdetail',
        component: () =>
            import ( /* webpackChunkName: "productdetail" */ '../views/ProductDetail.vue'),
        meta: {
            isShowTabbar: false
        }
    }
]

const router = new VueRouter({
    mode: 'history',
    base: process.env.BASE_URL,
    routes
})

// 全局路由守卫/路由拦截  
// 能够在每一次跳转路由之前拦截下来,做一定的逻辑处理
router.beforeEach((to, from, next) => {
    // 什么时候跑这里的代码???   路由发生变化之前执行
    // console.log("beforeEach执行了"); // 路由只要一发生变化就执行这里的代码
    // console.log("to是:", to);
    // // 要去往的路有对象
    // console.log("from是:", from);
    // // 从哪里出发的这个路由对象

    // // 判断是不是要进入购物车
    // if (to.path == "/cart") {
    //     // console.log("进入到购物车");
    //     // 判断有没有登录
    //     // 如果没有登录.跳转到/user页面
    //     let token = localStorage.getItem("token");
    //     if (token) {
    //         next()
    //     } else {
    //         Vue.prototype.$toast("请先登录!")
    //             // 拿不到不到token，说明没有登录，跳转到 “我的”  /user
    //         setTimeout(() => {
    //             next("/user")
    //         }, 500)
    //     }
    //     returns
    // }
    if (to.path === "/home") {
        // this.chanIsShowShadow(false)
        store["_mutations"]["showshadow/chanIsShowShadow"][0](false);
    }
    next();
    // 必须调用next()  才能跳转到想要去的页面.没有调用next.就无法跳转页面
})

export default router